5561000111 has 4 divisors (see below), whose sum is σ = 5562032112. Its totient is φ = 5559968112.

The previous prime is 5561000089. The next prime is 5561000117. The reversal of 5561000111 is 1110001655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5561000111 - 2¹⁸ = 5560737967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561000117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507875 + ... + 518708.

It is an arithmetic number, because the mean of its divisors is an integer number (1390508028).

Almost surely, 2^5561000111 is an apocalyptic number.

5561000111 is a deficient number, since it is larger than the sum of its proper divisors (1032001).

5561000111 is a wasteful number, since it uses less digits than its factorization.

5561000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032000.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 5561000111 is about 74572.1134942547. The cubic root of 5561000111 is about 1771.6759967535.

Adding to 5561000111 its reverse (1110001655), we get a palindrome (6671001766).

The spelling of 5561000111 in words is "five billion, five hundred sixty-one million, one hundred eleven", and thus it is an aban number.